How much does it cost to sell USDT?

I'm curious about the cost of selling USDT. Could you please elaborate on the fees involved? Are there any transaction costs I should be aware of? Is there a specific fee structure based on the amount of USDT I want to sell? Additionally, do exchange rates play a role in determining the final cost? I'm trying to understand the overall cost structure before making a decision. Could you please provide a breakdown of all the costs associated with selling USDT?